Home / 745,378.16-1,028,640.36-405,865.04

Finding the Fourth Proportional to 745,378.16, 1,028,640.36 and 405,865.04

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Solution

The fourth proportional to 745,378.16, 1,028,640.36 and 405,865.04 is: 560,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,378.16 : 1,028,640.36 = 405,865.04 : x
  2. Step 2: Convert to fraction form
    745,378.16/1,028,640.36 = 405,865.04/x
  3. Step 3: Cross multiply
    745,378.16x = 1,028,640.36 × 405,865.04
  4. Step 4: Simplify right side
    745,378.16x = 417,489,160,857.01
  5. Step 5: Solve for x
    x = 417,489,160,857.01/745,378.16
  6. Step 6: Final answer
    x = 560,103.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.